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1One-pot, solvent-free and efficient synthesis of 2,4,6-triarylpyridines catalyzed by nano-titania-supported sulfonic acid as a novel heterogeneous nanocatalyst显示文摘Nano titania-supported sulfonic acid(n-TSA) has found to be a highly efficient, eco-friendly and recyclable heterogeneous nanocatalyst for the solvent-free synthesis of 2,4,6-triarylpyridines through one-pot three-component reaction of acetophenones, aryl aldehydes and ammonium acetate. This reported method illustrates several advantages such as environmental friendliness reaction conditions,simplicity, short reaction time, easy work up, reusability of catalyst and high yields of the products. One new compound is reported too. Furthermore, the catalyst could be recycled after a simple work-up, and reused at least six times without substantial reduction in its catalytic activity.Elham Tabrizian Ali Amoozadeh Salman Rahmani Elham Imanifar Saeede Azhari Masoumeh Malmir 2015Chinese Chemical Letters2015,26,10:3
2Na Y zeolite functionalized by sulfamic acid/Cu(OAc)_2 as a new and reusable heterogeneous hybrid catalyst for efficient solvent-free formylation of amines显示文摘NaY zeolite functionalized by sulfamic acid/Cu(OAc)_2[NaY/SA/Cu(Ⅱ)] was synthesized and used as a new,efficient and recyclable catalyst for preparation of formamides. This novel organic-inorganic hybrid catalyst was characterized by several techniques such as FT-IR, XRD, SEM, EDX and TG analysis.Chemoselectivity, easy procedure, excellent yields, very short reaction times, solvent-free and mild reaction conditions are some benefits of this new protocol.Samira Kazemi Akbar Mobinikhaledi Mojgan Zendehdel 2017Chinese Chemical Letters2017,28,8:0
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